SpamAssassin is described as 'Use this program to "Unspam" your mailbox(es). The program can be integrated with the mail server to automatically filter all mail for a site. It can also be run by individual users on their own mailbox and integrates with several mail programs' and is a Anti-Spam tool in the security & privacy category. There are more than 10 alternatives to SpamAssassin for a variety of platforms, including Linux, Self-Hosted, Web-based, Windows and Mac apps. The best SpamAssassin alternative is Mailwasher, which is free. Other great apps like SpamAssassin are Rspamd, Proxmox Mail Gateway, BoxTrapper (cPanel Tool) and MailScanner.
Over 8 million people use MailWasher as their spam filter
Introducing MailWasher, the leader in spam filter software, and the easiest way to check and manage your e-mails before you download them.
MailWasher is free to use and wont ever expire. It works with Outlook, Outlook Ex.
client software vs server software
It actually allows the user to scan email on the server, prior to dowliading it with client software.
Proxmox Mail Gateway is the leading open-source email security solution helping you to protect your mail server against all email threats the moment they emerge.
BoxTrapper is a tool that filters spam from your inbox through a process called challenge-response verification. When an account that has BoxTrapper enabled receives an email, it automatically sends a customizable verification email in response.
MailScanner is a open source email security system design for Linux-based email gateways. It is used at over 30,000 sites around the world, protecting top government departments, commercial corporations and educational institutions.
Save time by adding powerful spam filtering to the e-mail client on your Mac. One of the only standalone spam filtering softwares for Mac.
Bogofilter is a mail filter that classifies mail as spam or ham (non-spam) by a statistical analysis of the message's header and content (body). The program is able to learn from the user's classifications and corrections.
AntispamSniper for The Bat! is a powerful antispam and anti-phishing plugin, providing advanced email protection and filtering for The Bat! email client.
Scrollout F1 is a free self-hosted email gateway designed for Linux & Windows administrators without advanced email security experience.
MailRoute provides a hosted service for mail protection from virus and spam.
MailRoute is a secure, hosted cloud email filtering service that you can have up and running in minutes. There's no hardware or software to install - just sign up, change your mx record, and you'.
Anti-spam gateway blocks more than 99% of spam with less than one in 1 million false positives and real-time automatic updates.
Spam Reader is a free anti-spam add-on for Microsoft Outlook. The software uses the most reliable approach to block junk emails - Bayesian algorithm based on statistical analysis, capable to be adjusted to user's needs and detect up to 98% of spam messages.
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SpamAssassin is server-based, while Mailwasher runs on email clients.